/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraTypes.h
Variables are the same name but if types are auto-assignable, allow them to match.
bool IsEquivalent ( const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) & Other, bool bAllowAssignableTypes ) const